not able to hash password in Expo IOS App - ios

Question

I am building an Expo App for IOS Phone. I have added login page which provides reset password mechanism. I have used Node.js program to reset the password and the new resetted password is saved as hash password using bcrypt (ex: $2b$05$cMUtC/1WHxzGNqDTJcCBJOf9i7D6ad57jKyYqChLF0Vvji1A2mzIq for Test123456) inside Mysql database. This is working well and good. Below is the node.js program:
users.js:
var express = require('express');
var router = express.Router();
var connection = require('../database.js');
var nodemailer = require('nodemailer');
var bcrypt = require('bcrypt');
var randtoken = require('rand-token');
//send email
function sendEmail(email, token) {
var email = email;
var token = token;
var mail = nodemailer.createTransport({
service: 'gmail',
auth: {
user: '*******#gmail.com', // Your email id
pass: '*******' // Your password
}
});
var mailOptions = {
from: 'abc#tech.com',
to: email,
subject: 'Reset Password Link - Tutsmake.com',
html: '<p>You requested for reset password, kindly use this link to reset
your password</p>'
};
mail.sendMail(mailOptions, function(error, info) {
if (error) {
console.log(1)
} else {
console.log(0)
}
});
}
/* home page */
router.get('/', function(req, res, next) {
res.render('index', {
title: 'Forget Password Page'
});
});
/* send reset password link in email */
router.post('/reset-password-email', function(req, res, next) {
var email = req.body.email;
connection.query('SELECT * FROM JTGDB.UserInfo WHERE email ="' + email + '"',
function(err, result) {
if (err) throw err;
var type = ''
var msg = ''
console.log(result[0]);
if (result[0].Email.length > 0) {
var token = randtoken.generate(20);
var sent = sendEmail(email, token);
if (sent != '0') {
var data = {
token: token
}
connection.query('UPDATE JTGDB.UserInfo SET ? WHERE email ="' + email + '"', data,
function(err, result) {
if(err) throw err
})
type = 'success';
msg = 'The reset password link has been sent to your email address';
} else {
type = 'error';
msg = 'Something goes to wrong. Please try again';
}
} else {
console.log('2');
type = 'error';
msg = 'The Email is not registered with us';
}
req.flash(type, msg);
res.redirect('/');
});
})
/* reset page */
router.get('/reset-password', function(req, res, next) {
res.render('reset-password', {
title: 'Reset Password Page',
token: req.query.token
});
});
/* update password to database */
router.post('/update-password', function(req, res, next) {
var token = req.body.token;
var password = req.body.password;
connection.query('SELECT * FROM JTGDB.UserInfo WHERE token ="' + token + '"',
function(err, result) {
if (err) throw err;
var type
var msg
if (result.length > 0) {
var saltRounds = 5;
bcrypt.genSalt(saltRounds, function(err, salt) {
bcrypt.hash(password, salt, function(err, hash) {
var data = {
password: hash
}
connection.query('UPDATE JTGDB.UserInfo SET ? WHERE email ="' + result[0].Email +
'"', data, function(err, result) {
if(err) throw err
});
});
});
type = 'success';
msg = 'Your password has been updated successfully';
} else {
console.log('2');
type = 'success';
msg = 'Invalid link; please try again';
}
req.flash(type, msg);
res.redirect('/');
});
})
module.exports = router;
But in Expo App, I want to hash the password that we enter in the login page and compare with the database hash password and then let the user to log into the App.
I have added a post request in app.js to get password from expo app and convert to hash code and compare it with database password to let user log in.Below is the app.js code .
app.js:
var express = require('express');
var path = require('path');
var cookieParser = require('cookie-parser');
var logger = require('morgan');
var flash = require('express-flash');
var session = require('express-session');
var bodyParser = require('body-parser');
const createError = require('http-errors');
var indexRouter = require('./routes/index');
var usersRouter = require('./routes/users');
var bcrypt = require('bcrypt');
var app = express();
/* hash password from database to expo App */
app.post('/hash-password', function(req, res, next) {
const password = req.body.password;
console.log('Password is '+password)
var saltRounds = 5;
//var hash = bcrypt.hash(password, saltRounds);
bcrypt.genSalt(saltRounds, function(err, salt) {
bcrypt.hash(password, salt, function(err, hash) {
var data = {
password: hash
}
console.log(data);
})
})
})
// view engine setup
app.set('views', path.join(__dirname, 'views'));
app.set('view engine', 'ejs');
app.use(logger('dev'));
app.use(express.json());
app.use(express.urlencoded({ extended: false }));
app.use(cookieParser());
app.use(express.static(path.join(__dirname, 'public')));
app.use(session({
secret: '********',
resave: false,
saveUninitialized: true,
cookie: { maxAge: 60000 }
}))
app.use(flash());
app.use('/', usersRouter);
// catch 404 and forward to error handler
app.use(function(req, res, next) {
next(createError(404));
});
// error handler
app.use(function(err, req, res, next) {
// set locals, only providing error in development
res.locals.message = err.message;
res.locals.error = req.app.get('env') === 'development' ? err :
{};
// render the error page
res.status(err.status || 500);
res.render('error');
});
app.listen(4000, function () {
console.log('Node app is running on port 4000');
});
module.exports = app;
I checked the code by sending password from postman ,but I am getting the below error: